 /*
 * jQuery UI selectmenu
 *
 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 */

(function($) {

jQuery.widget("ui.selectmenu", {
    _init: function() {
        var self = this, o = this.options;

        //quick array of button and menu id's
        this.ids = [this.element.attr('id') + '-' + 'button', this.element.attr('id') + '-' + 'menu'];

        //define safe mouseup for future toggling
        this._safemouseup = true;

        //create menu button wrapper
        this.newelement = jQuery('<a class="'+ this.widgetBaseClass +' ui-widget ui-state-default ui-corner-all" id="'+this.ids[0]+'" role="button" href="#" aria-haspopup="true" aria-owns="'+this.ids[1]+'"></a>')
            .insertAfter(this.element);

        //transfer tabindex
        var tabindex = this.element.attr('tabindex');
        if(tabindex){ this.newelement.attr('tabindex', tabindex); }

        //save reference to select in data for ease in calling methods
        this.newelement.data('selectelement', this.element);

        //menu icon
        this.selectmenuIcon = jQuery('<span class="'+ this.widgetBaseClass +'-icon ui-icon"></span>')
            .prependTo(this.newelement)
            .addClass( (o.style == "popup")? 'ui-icon-triangle-2-n-s' : 'ui-icon-triangle-1-s' );


        //make associated form label trigger focus
        jQuery('label[for='+this.element.attr('id')+']')
            .attr('for', this.ids[0])
            .bind('click', function(){
                self.newelement[0].focus();
                return false;
            });

        //click toggle for menu visibility
        this.newelement
            .bind('mousedown', function(event){
                self._toggle(event);
                //make sure a click won't open/close instantly
                if(o.style == "popup"){
                    self._safemouseup = false;
                    setTimeout(function(){self._safemouseup = true;}, 300);
                }
                return false;
            })
            .bind('click',function(){
                return false;
            })
            .keydown(function(event){
                var ret = true;
                switch (event.keyCode) {
                    case jQuery.ui.keyCode.ENTER:
                        ret = true;
                        break;
                    case jQuery.ui.keyCode.SPACE:
                        ret = false;
                        self._toggle(event);
                        break;
                    case jQuery.ui.keyCode.UP:
                    case jQuery.ui.keyCode.LEFT:
                        ret = false;
                        self._moveSelection(-1);
                        break;
                    case jQuery.ui.keyCode.DOWN:
                    case jQuery.ui.keyCode.RIGHT:
                        ret = false;
                        self._moveSelection(1);
                        break;
                    case jQuery.ui.keyCode.TAB:
                        ret = true;
                        break;
                    default:
                        ret = false;
                        self._typeAhead(event.keyCode, 'mouseup');
                        break;
                }
                return ret;
            })
            .bind('mouseover focus', function(){
                jQuery(this).addClass(self.widgetBaseClass+'-focus ui-state-hover');
            })
            .bind('mouseout blur', function(){
                jQuery(this).removeClass(self.widgetBaseClass+'-focus ui-state-hover');
            });

        //document click closes menu
        jQuery(document)
            .mousedown(function(event){
                self.close(event);
            });

        //change event on original selectmenu
        this.element
            .click(function(){ this._refreshValue(); })
            .focus(function(){ this.newelement[0].focus(); });

        //create menu portion, append to body
        var cornerClass = (o.style == "dropdown")? " ui-corner-bottom" : " ui-corner-all"
        this.list = jQuery('<ul class="' + self.widgetBaseClass + '-menu ui-widget ui-widget-content'+cornerClass+'" aria-hidden="true" role="listbox" aria-labelledby="'+this.ids[0]+'" id="'+this.ids[1]+'"></ul>').appendTo('body');

        //serialize selectmenu element options
        var selectOptionData = [];
        this.element
            .find('option')
            .each(function(){
                selectOptionData.push({
                    value: jQuery(this).attr('value'),
                    text: self._formatText(jQuery(this).text()),
                    selected: jQuery(this).attr('selected'),
                    classes: jQuery(this).attr('class'),
                    parentOptGroup: jQuery(this).parent('optgroup').attr('label')
                });
            });

        //active state class is only used in popup style
        var activeClass = (self.options.style == "popup") ? " ui-state-active" : "";

        //write li's
        for(var i in selectOptionData){
            var thisLi = jQuery('<li role="presentation"><a href="#" tabindex="-1" role="option" aria-selected="false">'+ selectOptionData[i].text +'</a></li>')
                .data('index',i)
                .addClass(selectOptionData[i].classes)
                .data('optionClasses', selectOptionData[i].classes|| '')
                .mouseup(function(event){
                        if(self._safemouseup){
                            var changed = jQuery(this).data('index') != self._selectedIndex();
                            self.value(jQuery(this).data('index'));
                            self.select(event);
                            if(changed){ self.change(event); }
                            self.close(event,true);
                        }
                    return false;
                })
                .click(function(){
                    return false;
                })
                .bind('mouseover focus', function(){
                    self._selectedOptionLi().addClass(activeClass);
                    self._focusedOptionLi().removeClass(self.widgetBaseClass+'-item-focus ui-state-hover');
                    jQuery(this).removeClass('ui-state-active').addClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                })
                .bind('mouseout blur', function(){
                    if(jQuery(this).is( self._selectedOptionLi() )){ jQuery(this).addClass(activeClass); }
                    jQuery(this).removeClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                });

            //optgroup or not...
            if(selectOptionData[i].parentOptGroup){
                var optGroupName = self.widgetBaseClass + '-group-' + selectOptionData[i].parentOptGroup;
                if(this.list.find('li.' + optGroupName).size()){
                    this.list.find('li.' + optGroupName + ':last ul').append(thisLi);
                }
                else{
                    jQuery('<li role="presentation" class="'+self.widgetBaseClass+'-group '+optGroupName+'"><span class="'+self.widgetBaseClass+'-group-label">'+selectOptionData[i].parentOptGroup+'</span><ul></ul></li>')
                        .appendTo(this.list)
                        .find('ul')
                        .append(thisLi);
                }
            }
            else{
                thisLi.appendTo(this.list);
            }

            //this allows for using the scrollbar in an overflowed list
            this.list.bind('mousedown mouseup', function(){return false;});

            //append icon if option is specified
            if(o.icons){
                for(var j in o.icons){
                    if(thisLi.is(o.icons[j].find)){
                        thisLi
                            .data('optionClasses', selectOptionData[i].classes + ' ' + self.widgetBaseClass + '-hasIcon')
                            .addClass(self.widgetBaseClass + '-hasIcon');
                        var iconClass = o.icons[j].icon || "";

                        thisLi
                            .find('a:eq(0)')
                            .prepend('<span class="'+self.widgetBaseClass+'-item-icon ui-icon '+iconClass + '"></span>');
                    }
                }
            }
        }

        //add corners to top and bottom menu items
        this.list.find('li:last').addClass("ui-corner-bottom");
        if(o.style == 'popup'){ this.list.find('li:first').addClass("ui-corner-top"); }

        //transfer classes to selectmenu and list
        if(o.transferClasses){
            var transferClasses = this.element.attr('class') || '';
            this.newelement.add(this.list).addClass(transferClasses);
        }

        //original selectmenu width
        var selectWidth = this.element.width();

        //set menu button width
        this.newelement.width( (o.width) ? o.width : selectWidth);

        //set menu width to either menuWidth option value, width option value, or select width
        if(o.style == 'dropdown'){ this.list.width( (o.menuWidth) ? o.menuWidth : ((o.width) ? o.width : selectWidth)); }
        else { this.list.width( (o.menuWidth) ? o.menuWidth : ((o.width) ? o.width - o.handleWidth : selectWidth - o.handleWidth)); }

        //set max height from option
        if(o.maxHeight && o.maxHeight < this.list.height()){ this.list.height(o.maxHeight); }

        //save reference to actionable li's (not group label li's)
        this._optionLis = this.list.find('li:not(.'+ self.widgetBaseClass +'-group)');

        //transfer menu click to menu button
        this.list
            .keydown(function(event){
                var ret = true;
                switch (event.keyCode) {
                    case jQuery.ui.keyCode.UP:
                    case jQuery.ui.keyCode.LEFT:
                        ret = false;
                        self._moveFocus(-1);
                        break;
                    case jQuery.ui.keyCode.DOWN:
                    case jQuery.ui.keyCode.RIGHT:
                        ret = false;
                        self._moveFocus(1);
                        break;
                    case jQuery.ui.keyCode.HOME:
                        ret = false;
                        self._moveFocus(':first');
                        break;
                    case jQuery.ui.keyCode.PAGE_UP:
                        ret = false;
                        self._scrollPage('up');
                        break;
                    case jQuery.ui.keyCode.PAGE_DOWN:
                        ret = false;
                        self._scrollPage('down');
                        break;
                    case jQuery.ui.keyCode.END:
                        ret = false;
                        self._moveFocus(':last');
                        break;
                    case jQuery.ui.keyCode.ENTER:
                    case jQuery.ui.keyCode.SPACE:
                        ret = false;
                        self.close(event,true);
                        jQuery(event.target).parents('li:eq(0)').trigger('mouseup');
                        break;
                    case jQuery.ui.keyCode.TAB:
                        ret = true;
                        self.close(event,true);
                        break;
                    case jQuery.ui.keyCode.ESCAPE:
                        ret = false;
                        self.close(event,true);
                        break;
                    default:
                        ret = false;
                        self._typeAhead(event.keyCode,'focus');
                        break;
                }
                return ret;
            });

        //selectmenu style
        if(o.style == 'dropdown'){
            this.newelement
                .addClass(self.widgetBaseClass+"-dropdown");
            this.list
                .addClass(self.widgetBaseClass+"-menu-dropdown");
        }
        else {
            this.newelement
                .addClass(self.widgetBaseClass+"-popup");
            this.list
                .addClass(self.widgetBaseClass+"-menu-popup");
        }

        //append status span to button
        this.newelement.prepend('<span class="'+self.widgetBaseClass+'-status">'+ selectOptionData[this._selectedIndex()].text +'</span>');

        //hide original selectmenu element
        this.element.hide();

        //transfer disabled state
        if(this.element.attr('disabled') == true){ this.disable(); }

        //update value
        this.value(this._selectedIndex());
    },
    destroy: function() {
        this.element.removeData(this.widgetName)
            .removeClass(this.widgetBaseClass + '-disabled' + ' ' + this.namespace + '-state-disabled')
            .removeAttr('aria-disabled');

        //unbind click on label, reset its for attr
        jQuery('label[for='+this.newelement.attr('id')+']')
            .attr('for',this.element.attr('id'))
            .unbind('click');
        this.newelement.remove();
        this.list.remove();
        this.element.show();
    },
    _typeAhead: function(code, eventType){
        var self = this;
        //define self._prevChar if needed
        if(!self._prevChar){ self._prevChar = ['',0]; }
        var C = String.fromCharCode(code);
        c = C.toLowerCase();
        var focusFound = false;
        function focusOpt(elem, ind){
            focusFound = true;
            jQuery(elem).trigger(eventType);
            self._prevChar[1] = ind;
        };
        this.list.find('li a').each(function(i){
            if(!focusFound){
                var thisText = jQuery(this).text();
                if( thisText.indexOf(C) == 0 || thisText.indexOf(c) == 0){
                        if(self._prevChar[0] == C){
                            if(self._prevChar[1] < i){ focusOpt(this,i); }
                        }
                        else{ focusOpt(this,i); }
                }
            }
        });
        this._prevChar[0] = C;
    },
    _uiHash: function(){
        return {
            value: this.value()
        };
    },
    open: function(event){
        var self = this;
        var disabledStatus = this.newelement.attr("aria-disabled");
        if(disabledStatus != 'true'){
            this._refreshPosition();
            this._closeOthers(event);
            this.newelement
                .addClass('ui-state-active');

            this.list
                .appendTo('body')
                .addClass(self.widgetBaseClass + '-open')
                .attr('aria-hidden', false)
                .find('li:not(.'+ self.widgetBaseClass +'-group):eq('+ this._selectedIndex() +') a')[0].focus();
            if(this.options.style == "dropdown"){ this.newelement.removeClass('ui-corner-all').addClass('ui-corner-top'); }
            this._refreshPosition();
            this._trigger("open", event, this._uiHash());
        }
    },
    close: function(event, retainFocus){
        if(this.newelement.is('.ui-state-active')){
            this.newelement
                .removeClass('ui-state-active');
            this.list
                .attr('aria-hidden', true)
                .removeClass(this.widgetBaseClass+'-open');
            if(this.options.style == "dropdown"){ this.newelement.removeClass('ui-corner-top').addClass('ui-corner-all'); }
            if(retainFocus){this.newelement[0].focus();}
            this._trigger("close", event, this._uiHash());
        }
    },
    change: function(event) {
        this.element.trigger('change');
        this._trigger("change", event, this._uiHash());
    },
    select: function(event) {
        this._trigger("select", event, this._uiHash());
    },
    _closeOthers: function(event){
        jQuery('.'+ this.widgetBaseClass +'.ui-state-active').not(this.newelement).each(function(){
            jQuery(this).data('selectelement').selectmenu('close',event);
        });
        jQuery('.'+ this.widgetBaseClass +'.ui-state-hover').trigger('mouseout');
    },
    _toggle: function(event,retainFocus){
        if(this.list.is('.'+ this.widgetBaseClass +'-open')){ this.close(event,retainFocus); }
        else { this.open(event); }
    },
    _formatText: function(text){
        return this.options.format ? this.options.format(text) : text;
    },
    _selectedIndex: function(){
        return this.element[0].selectedIndex;
    },
    _selectedOptionLi: function(){
        return this._optionLis.eq(this._selectedIndex());
    },
    _focusedOptionLi: function(){
        return this.list.find('.'+ this.widgetBaseClass +'-item-focus');
    },
    _moveSelection: function(amt){
        var currIndex = parseInt(this._selectedOptionLi().data('index'), 10);
        var newIndex = currIndex + amt;
        return this._optionLis.eq(newIndex).trigger('mouseup');
    },
    _moveFocus: function(amt){
        if(!isNaN(amt)){
            var currIndex = parseInt(this._focusedOptionLi().data('index'), 10);
            var newIndex = currIndex + amt;
        }
        else { var newIndex = parseInt(this._optionLis.filter(amt).data('index'), 10); }

        if(newIndex < 0){ newIndex = 0; }
        if(newIndex > this._optionLis.size()-1){
            newIndex =  this._optionLis.size()-1;
        }
        var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);

        this._focusedOptionLi().find('a:eq(0)').attr('id','');
        this._optionLis.eq(newIndex).find('a:eq(0)').attr('id',activeID)[0].focus();
        this.list.attr('aria-activedescendant', activeID);
    },
    _scrollPage: function(direction){
        var numPerPage = Math.floor(this.list.outerHeight() / this.list.find('li:first').outerHeight());
        numPerPage = (direction == 'up') ? -numPerPage : numPerPage;
        this._moveFocus(numPerPage);
    },
    _setData: function(key, value) {
        this.options[key] = value;
        if (key == 'disabled') {
            this.close();
            this.element
                .add(this.newelement)
                .add(this.list)
                    [value ? 'addClass' : 'removeClass'](
                        this.widgetBaseClass + '-disabled' + ' ' +
                        this.namespace + '-state-disabled')
                    .attr("aria-disabled", value);
        }
    },
    value: function(newValue) {
        if (arguments.length) {
            this.element[0].selectedIndex = newValue;
            this._refreshValue();
            this._refreshPosition();
        }
        return this.element[0].selectedIndex;
    },
    _refreshValue: function() {
        var activeClass = (this.options.style == "popup") ? " ui-state-active" : "";
        var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);
        //deselect previous
        this.list
            .find('.'+ this.widgetBaseClass +'-item-selected')
            .removeClass(this.widgetBaseClass + "-item-selected" + activeClass)
            .find('a')
            .attr('aria-selected', 'false')
            .attr('id', '');
        //select new
        this._selectedOptionLi()
            .addClass(this.widgetBaseClass + "-item-selected"+activeClass)
            .find('a')
            .attr('aria-selected', 'true')
            .attr('id', activeID);

        //toggle any class brought in from option
        var currentOptionClasses = this.newelement.data('optionClasses') ? this.newelement.data('optionClasses') : "";
        var newOptionClasses = this._selectedOptionLi().data('optionClasses') ? this._selectedOptionLi().data('optionClasses') : "";
        this.newelement
            .removeClass(currentOptionClasses)
            .data('optionClasses', newOptionClasses)
            .addClass( newOptionClasses )
            .find('.'+this.widgetBaseClass+'-status')
            .html(
                this._selectedOptionLi()
                    .find('a:eq(0)')
                    .html()
            );

        this.list.attr('aria-activedescendant', activeID)
    },
    _refreshPosition: function(){
        //set left value
        this.list.css('left', this.newelement.offset().left);

        //set top value
        var menuTop = this.newelement.offset().top;
        var scrolledAmt = this.list[0].scrollTop;
        this.list.find('li:lt('+this._selectedIndex()+')').each(function(){
            scrolledAmt -= jQuery(this).outerHeight();
        });

        if(this.newelement.is('.'+this.widgetBaseClass+'-popup')){
            menuTop+=scrolledAmt;
            this.list.css('top', menuTop);
        }
        else {
            menuTop += this.newelement.height();
            this.list.css('top', menuTop);
        }
    }
});

jQuery.extend(jQuery.ui.selectmenu, {
    getter: "value",
    version: "@VERSION",
    eventPrefix: "selectmenu",
    defaults: {
        transferClasses: true,
        style: 'popup',
        width: null,
        menuWidth: null,
        handleWidth: 26,
        maxHeight: null,
        icons: null,
        format: null
    }
});

})(jQuery);
